Table 3.

Comparison of the associations with occupational group and occupational activities between cases with severe lumbar spinal stenosis and controls with no severe stenosis, stratified by age

	<75 years						> = 75 years
	Model 1			Model 2			Model 1			Model 2
	OR	95%CIs	P	OR	95%CIs	P	OR	95%CIs	P	OR	95%CIs	P
Occupational group
Clerical/technical experts	Baseline			Baseline			Baseline			Baseline
Agricultural/Fishermen	1.79	(0.73,4.41)	0.2	1.49	(0.59,3.79)	0.4	1.22	(0.63,2.37)	0.55	1.17	(0.59,2.31)	0.65
Factory/construction	4.38	(1.66,11.59)	<0.001	3.97	(1.46,10.85)	0.01	0.83	(0.34,2.06)	0.69	0.79	(0.32,1.97)	0.61
Clinical/Housekeepers/Shop assistants/Hairdressers/Dressmakers	0.92	(0.51,1.66)	0.79	0.85	(0.46,1.58)	0.61	1.19	(0.61,2.32)	0.62	0.96	(0.47,1.96)	0.91
Teachers	1.34	(0.48,3.75)	0.57	1.55	(0.54,4.43)	0.41	0.91	(0.37,2.21)	0.83	0.97	(0.39,2.45)	0.95
Other/NA	1.26	(0.65,2.45)	0.49	1.1	(0.55,2.19)	0.79	0.6	(0.26,1.36)	0.22	0.54	(0.23,1.24)	0.14
Occupational activities
Sitting	0.77	(0.49,1.21)	0.27	0.75	(0.47,1.19)	0.22	1.23	(0.78,1.93)	0.38	1.32	(0.82,2.11)	0.25
Standing	1.4	(0.82,2.39)	0.21	1.4	(0.81,2.42)	0.23	0.95	(0.49,1.84)	0.87	0.93	(0.47,1.86)	0.85
Kneeling	1.44	(0.78,2.65)	0.24	1.26	(0.67,2.35)	0.47	1.54	(0.87,2.74)	0.14	1.49	(0.83,2.69)	0.18
Squatting	1.76	(1.01,3.07)	0.05	1.51	(0.85,2.69)	0.16	1	(0.61,1.64)	1	0.97	(0.58,1.61)	0.9
Driving	1.28	(0.44,3.71)	0.65	1	(0.33,3.04)	1	1.03	(0.39,2.68)	0.96	1.37	(0.50,3.75)	0.54
Walking	1.07	(0.62,1.86)	0.8	1.01	(0.58,1.77)	0.97	1.11	(0.71,1.73)	0.65	1.15	(0.72,1.83)	0.56
Upstairs	0.77	(0.44,1.35)	0.36	0.69	(0.38,1.24)	0.21	0.84	(0.50,1.40)	0.49	0.89	(0.52,1.51)	0.67
Climbing	1.22	(0.37,3.98)	0.74	1.13	(0.33,3.85)	0.85	0.93	(0.56,1.55)	0.78	0.91	(0.53,1.57)	0.74
Lifting	1.15	(0.73,1.81)	0.55	1.08	(0.66,1.75)	0.76	0.74	(0.47,1.15)	0.18	0.76	(0.48,1.21)	0.24

Model 1: Unadjusted OR; Model 2: Adjusted for age, sex, BMI, smoking, usual walking speed.